local pcall = pcall

local M = {}

function M:hello(a, b, c)
    print(a, b, c, d)

    return a + b
end

return function()
    print("===>Test: lua_pcall")
    local ok, res = pcall(M.hello, M, 1, 2, 3, 4)

    print(ok, res)
end
